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255/40/17 on a 8" rim?

Is it possible/ok to mount a 255/40/17 on a 8" rim? I have a set of staggered winter tires for my 2002 530i M-sport (235 front, 255 rear) that I'd like to mount on a set of used 17x8" rims that I have a line on. I've heard that it's possible, but I just want to know if it'll look odd or is dangergous.

Re: 255/40/17 on a 8 rim?

I had 255/40-18 for a brief period on 8.5x18 wheels, and even that caused the sidewalls to balloon slightly along with a small degradation in handling. Though given tire sizes vary in actual dimensions depending on the manufacturer and model, I would not put that size on an 8" width wheel, and would be hesitant even on an 8.5"

Re: 255/40/17 on a 8 rim?

My experience has been somewhat different. The 255 tires should fit fine on an 8" rim. I have 245/45R17s on 8" rims and they are almost flush with the rim so 5mm extra on each side should be fine for a rim fitting. The standard tire on the 525i/530i is a 225 on a 7" rim which baloons out more than a 255 would on an 8" rim.

Only E39 wheels fit E39's. The hub size is unique.

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